Watch List notes:

Mercia, Offa (757-796), Penny, Light coinage, East Anglia, portrait type, Aethelræd, 1.12g, 12h, + OFFA + REX, cross on steps, rev. incurved quadrilateral at centre of long cross crosslet, OE|ðE|LR|ES in angle (Chick 176 same dies, albeit this coin not listed; CEB -; N.331; S.907), minor flan crimping and a hint of surface porosity, otherwise darkly toned, a bolder very fine, very rare.
Provenance
Spink 265, 10 December 2019, lot 28
Vosper FPL, 2010, ref. W2-393 (acquired 3 April 2010)
also including a Dolphin Coins ticket, ref. 7a.1709 - £1,500

Estimate: £1,000 - £1,200